{
 "cells": [
  {
   "cell_type": "markdown",
   "id": "b97bc0d8",
   "metadata": {},
   "source": [
    "***\n",
    "* 2022-08-30\n",
    "* python学习第二周\n",
    "* 记录人：李奥琪\n",
    "***"
   ]
  },
  {
   "cell_type": "markdown",
   "id": "9ea32819",
   "metadata": {},
   "source": [
    "# 本周学习内容"
   ]
  },
  {
   "cell_type": "markdown",
   "id": "f86a7299",
   "metadata": {},
   "source": [
    "## Head First Python P4"
   ]
  },
  {
   "cell_type": "markdown",
   "id": "f89849ba",
   "metadata": {},
   "source": [
    "> 一定要按规格书写以下代码"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 23,
   "id": "d112c5dc",
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "894307"
      ]
     },
     "execution_count": 23,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "datetime.today().microsecond"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 33,
   "id": "31337d3f",
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "36\n",
      "现在是分钟为偶数的时间.\n"
     ]
    }
   ],
   "source": [
    "from datetime import datetime\n",
    "# 本项目用到了时间模块\n",
    "\n",
    "# odds是一个变量，后面可以直接使用\n",
    "odds=[    1, 3,  5,  7,  9, 11,13,15,17,19,\n",
    "             21,23,25,27,29,31,33,35,37,39,\n",
    "             41,43,45,47,49,51,53,55,57,59]\n",
    "\n",
    "# right_this_minute 是一个变量，是随着当前时间分钟数不断变化的一个值\n",
    "right_this_minute = datetime.today().minute\n",
    "\n",
    "if right_this_minute in odds:\n",
    "    print(right_this_minute)\n",
    "    print(\"现在是分钟为奇数的时间.\")\n",
    "else:\n",
    "    print(right_this_minute)\n",
    "    print(\"现在是分钟为偶数的时间.\")\n",
    "    \n",
    "# print(datetime.datetime.today().microsecond)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 34,
   "id": "9dc2dbec",
   "metadata": {},
   "outputs": [],
   "source": [
    "# 判断当前是一周中的星期几，如果是星期二，然后打印Python课表"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "id": "6424befb",
   "metadata": {},
   "outputs": [],
   "source": [
    "import time"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 35,
   "id": "e3b4b1e6",
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "1"
      ]
     },
     "execution_count": 35,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "time.localtime().tm_wday"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 49,
   "id": "976c54f4",
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "今天有python课，时间为： 下午2：30-4：50\n"
     ]
    }
   ],
   "source": [
    "# tm_wday：  0-6  0 是星期一\n",
    "today = time.localtime().tm_wday\n",
    "\n",
    "if today == 1:\n",
    "    print(\"今天有python课，时间为： 下午2：30-4：50\")\n",
    "else:\n",
    "    print(\"今天没有python课，哈哈哈哈哈哈哈哈哈，太开心了！\")"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 48,
   "id": "71a86fdd",
   "metadata": {},
   "outputs": [],
   "source": [
    "import time"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 50,
   "id": "2418b97f",
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "16"
      ]
     },
     "execution_count": 50,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "time.localtime().tm_hour  #是不是在 14到16之间   如果是14 再看tm_minute 是不是在0-30 如果是16的话，再看tm_minute是不是在50以上"
   ]
  },
  {
   "cell_type": "markdown",
   "id": "0047903b",
   "metadata": {},
   "source": [
    "# 课后练习"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 51,
   "id": "9f79dc3d",
   "metadata": {},
   "outputs": [],
   "source": [
    "## 判断当前是一周中的星期几，如果是星期二，看下现在几点了，是python课ing么？然后打印Python课表"
   ]
  },
  {
   "cell_type": "markdown",
   "id": "2dcd8f24",
   "metadata": {},
   "source": [
    "# 2.1模块--标准库\n",
    "   * 标准库是Python开发团队为满足Python用户日常需求而写好的一些模块，可以直接使用： import 模块名称 \n",
    "   > 1. sys模块\n",
    "   > 2. os模块\n",
    "   > 3. datetime模块"
   ]
  },
  {
   "cell_type": "markdown",
   "id": "754f86dc",
   "metadata": {},
   "source": [
    "# 2.2 模块--开源模块（pypi.org）\n"
   ]
  },
  {
   "cell_type": "markdown",
   "id": "1d4eb327",
   "metadata": {},
   "source": [
    "# 2.3 自定义模块"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 5,
   "id": "557e34b3",
   "metadata": {},
   "outputs": [],
   "source": [
    "import sys"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 6,
   "id": "0caac047",
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "'3.9.7 (default, Sep 16 2021, 16:59:28) [MSC v.1916 64 bit (AMD64)]'"
      ]
     },
     "execution_count": 6,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "sys.version"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 7,
   "id": "136a3241",
   "metadata": {},
   "outputs": [],
   "source": [
    "import os"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 8,
   "id": "7a5554bf",
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "'D:\\\\2022-09-LAQ'"
      ]
     },
     "execution_count": 8,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "os.getcwd()"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 9,
   "id": "d5e1152a",
   "metadata": {},
   "outputs": [],
   "source": [
    "import datetime"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 10,
   "id": "00e63711",
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "datetime.date(2022, 8, 30)"
      ]
     },
     "execution_count": 10,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "datetime.date.today()"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 25,
   "id": "b5e37c31",
   "metadata": {},
   "outputs": [],
   "source": [
    "# 认识下 time模块"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 13,
   "id": "8324722c",
   "metadata": {},
   "outputs": [],
   "source": [
    "import time"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 14,
   "id": "42a73f4d",
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "time.struct_time(tm_year=2022, tm_mon=8, tm_mday=30, tm_hour=14, tm_min=29, tm_sec=53, tm_wday=1, tm_yday=242, tm_isdst=0)"
      ]
     },
     "execution_count": 14,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "time.localtime()"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 16,
   "id": "f020d258",
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "1661841134.739322"
      ]
     },
     "execution_count": 16,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "time.time()# 时间戳"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 17,
   "id": "ce374e8b",
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "52.696637856899486"
      ]
     },
     "execution_count": 17,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "time.time()/60/60/24/365"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 18,
   "id": "9b1e7569",
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "1970"
      ]
     },
     "execution_count": 18,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "2022-52"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 19,
   "id": "bc9ea27f",
   "metadata": {},
   "outputs": [
    {
     "ename": "ModuleNotFoundError",
     "evalue": "No module named 'apple'",
     "output_type": "error",
     "traceback": [
      "\u001b[1;31m---------------------------------------------------------------------------\u001b[0m",
      "\u001b[1;31mModuleNotFoundError\u001b[0m                       Traceback (most recent call last)",
      "\u001b[1;32m~\\AppData\\Local\\Temp/ipykernel_9644/2364371656.py\u001b[0m in \u001b[0;36m<module>\u001b[1;34m\u001b[0m\n\u001b[1;32m----> 1\u001b[1;33m \u001b[1;32mimport\u001b[0m \u001b[0mapple\u001b[0m\u001b[1;33m\u001b[0m\u001b[1;33m\u001b[0m\u001b[0m\n\u001b[0m",
      "\u001b[1;31mModuleNotFoundError\u001b[0m: No module named 'apple'"
     ]
    }
   ],
   "source": [
    "import apple"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 24,
   "id": "d8b35cd8",
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "time.struct_time(tm_year=2022, tm_mon=8, tm_mday=30, tm_hour=7, tm_min=44, tm_sec=24, tm_wday=1, tm_yday=242, tm_isdst=0)"
      ]
     },
     "execution_count": 24,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "time.gmtime()"
   ]
  },
  {
   "cell_type": "markdown",
   "id": "541b4dc2",
   "metadata": {},
   "source": [
    "## help"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 26,
   "id": "965c1e8e",
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "Help on built-in module time:\n",
      "\n",
      "NAME\n",
      "    time - This module provides various functions to manipulate time values.\n",
      "\n",
      "DESCRIPTION\n",
      "    There are two standard representations of time.  One is the number\n",
      "    of seconds since the Epoch, in UTC (a.k.a. GMT).  It may be an integer\n",
      "    or a floating point number (to represent fractions of seconds).\n",
      "    The Epoch is system-defined; on Unix, it is generally January 1st, 1970.\n",
      "    The actual value can be retrieved by calling gmtime(0).\n",
      "    \n",
      "    The other representation is a tuple of 9 integers giving local time.\n",
      "    The tuple items are:\n",
      "      year (including century, e.g. 1998)\n",
      "      month (1-12)\n",
      "      day (1-31)\n",
      "      hours (0-23)\n",
      "      minutes (0-59)\n",
      "      seconds (0-59)\n",
      "      weekday (0-6, Monday is 0)\n",
      "      Julian day (day in the year, 1-366)\n",
      "      DST (Daylight Savings Time) flag (-1, 0 or 1)\n",
      "    If the DST flag is 0, the time is given in the regular time zone;\n",
      "    if it is 1, the time is given in the DST time zone;\n",
      "    if it is -1, mktime() should guess based on the date and time.\n",
      "\n",
      "CLASSES\n",
      "    builtins.tuple(builtins.object)\n",
      "        struct_time\n",
      "    \n",
      "    class struct_time(builtins.tuple)\n",
      "     |  struct_time(iterable=(), /)\n",
      "     |  \n",
      "     |  The time value as returned by gmtime(), localtime(), and strptime(), and\n",
      "     |  accepted by asctime(), mktime() and strftime().  May be considered as a\n",
      "     |  sequence of 9 integers.\n",
      "     |  \n",
      "     |  Note that several fields' values are not the same as those defined by\n",
      "     |  the C language standard for struct tm.  For example, the value of the\n",
      "     |  field tm_year is the actual year, not year - 1900.  See individual\n",
      "     |  fields' descriptions for details.\n",
      "     |  \n",
      "     |  Method resolution order:\n",
      "     |      struct_time\n",
      "     |      builtins.tuple\n",
      "     |      builtins.object\n",
      "     |  \n",
      "     |  Methods defined here:\n",
      "     |  \n",
      "     |  __reduce__(...)\n",
      "     |      Helper for pickle.\n",
      "     |  \n",
      "     |  __repr__(self, /)\n",
      "     |      Return repr(self).\n",
      "     |  \n",
      "     |  ----------------------------------------------------------------------\n",
      "     |  Static methods defined here:\n",
      "     |  \n",
      "     |  __new__(*args, **kwargs) from builtins.type\n",
      "     |      Create and return a new object.  See help(type) for accurate signature.\n",
      "     |  \n",
      "     |  ----------------------------------------------------------------------\n",
      "     |  Data descriptors defined here:\n",
      "     |  \n",
      "     |  tm_gmtoff\n",
      "     |      offset from UTC in seconds\n",
      "     |  \n",
      "     |  tm_hour\n",
      "     |      hours, range [0, 23]\n",
      "     |  \n",
      "     |  tm_isdst\n",
      "     |      1 if summer time is in effect, 0 if not, and -1 if unknown\n",
      "     |  \n",
      "     |  tm_mday\n",
      "     |      day of month, range [1, 31]\n",
      "     |  \n",
      "     |  tm_min\n",
      "     |      minutes, range [0, 59]\n",
      "     |  \n",
      "     |  tm_mon\n",
      "     |      month of year, range [1, 12]\n",
      "     |  \n",
      "     |  tm_sec\n",
      "     |      seconds, range [0, 61])\n",
      "     |  \n",
      "     |  tm_wday\n",
      "     |      day of week, range [0, 6], Monday is 0\n",
      "     |  \n",
      "     |  tm_yday\n",
      "     |      day of year, range [1, 366]\n",
      "     |  \n",
      "     |  tm_year\n",
      "     |      year, for example, 1993\n",
      "     |  \n",
      "     |  tm_zone\n",
      "     |      abbreviation of timezone name\n",
      "     |  \n",
      "     |  ----------------------------------------------------------------------\n",
      "     |  Data and other attributes defined here:\n",
      "     |  \n",
      "     |  n_fields = 11\n",
      "     |  \n",
      "     |  n_sequence_fields = 9\n",
      "     |  \n",
      "     |  n_unnamed_fields = 0\n",
      "     |  \n",
      "     |  ----------------------------------------------------------------------\n",
      "     |  Methods inherited from builtins.tuple:\n",
      "     |  \n",
      "     |  __add__(self, value, /)\n",
      "     |      Return self+value.\n",
      "     |  \n",
      "     |  __contains__(self, key, /)\n",
      "     |      Return key in self.\n",
      "     |  \n",
      "     |  __eq__(self, value, /)\n",
      "     |      Return self==value.\n",
      "     |  \n",
      "     |  __ge__(self, value, /)\n",
      "     |      Return self>=value.\n",
      "     |  \n",
      "     |  __getattribute__(self, name, /)\n",
      "     |      Return getattr(self, name).\n",
      "     |  \n",
      "     |  __getitem__(self, key, /)\n",
      "     |      Return self[key].\n",
      "     |  \n",
      "     |  __getnewargs__(self, /)\n",
      "     |  \n",
      "     |  __gt__(self, value, /)\n",
      "     |      Return self>value.\n",
      "     |  \n",
      "     |  __hash__(self, /)\n",
      "     |      Return hash(self).\n",
      "     |  \n",
      "     |  __iter__(self, /)\n",
      "     |      Implement iter(self).\n",
      "     |  \n",
      "     |  __le__(self, value, /)\n",
      "     |      Return self<=value.\n",
      "     |  \n",
      "     |  __len__(self, /)\n",
      "     |      Return len(self).\n",
      "     |  \n",
      "     |  __lt__(self, value, /)\n",
      "     |      Return self<value.\n",
      "     |  \n",
      "     |  __mul__(self, value, /)\n",
      "     |      Return self*value.\n",
      "     |  \n",
      "     |  __ne__(self, value, /)\n",
      "     |      Return self!=value.\n",
      "     |  \n",
      "     |  __rmul__(self, value, /)\n",
      "     |      Return value*self.\n",
      "     |  \n",
      "     |  count(self, value, /)\n",
      "     |      Return number of occurrences of value.\n",
      "     |  \n",
      "     |  index(self, value, start=0, stop=9223372036854775807, /)\n",
      "     |      Return first index of value.\n",
      "     |      \n",
      "     |      Raises ValueError if the value is not present.\n",
      "     |  \n",
      "     |  ----------------------------------------------------------------------\n",
      "     |  Class methods inherited from builtins.tuple:\n",
      "     |  \n",
      "     |  __class_getitem__(...) from builtins.type\n",
      "     |      See PEP 585\n",
      "\n",
      "FUNCTIONS\n",
      "    asctime(...)\n",
      "        asctime([tuple]) -> string\n",
      "        \n",
      "        Convert a time tuple to a string, e.g. 'Sat Jun 06 16:26:11 1998'.\n",
      "        When the time tuple is not present, current time as returned by localtime()\n",
      "        is used.\n",
      "    \n",
      "    ctime(...)\n",
      "        ctime(seconds) -> string\n",
      "        \n",
      "        Convert a time in seconds since the Epoch to a string in local time.\n",
      "        This is equivalent to asctime(localtime(seconds)). When the time tuple is\n",
      "        not present, current time as returned by localtime() is used.\n",
      "    \n",
      "    get_clock_info(...)\n",
      "        get_clock_info(name: str) -> dict\n",
      "        \n",
      "        Get information of the specified clock.\n",
      "    \n",
      "    gmtime(...)\n",
      "        gmtime([seconds]) -> (tm_year, tm_mon, tm_mday, tm_hour, tm_min,\n",
      "                               tm_sec, tm_wday, tm_yday, tm_isdst)\n",
      "        \n",
      "        Convert seconds since the Epoch to a time tuple expressing UTC (a.k.a.\n",
      "        GMT).  When 'seconds' is not passed in, convert the current time instead.\n",
      "        \n",
      "        If the platform supports the tm_gmtoff and tm_zone, they are available as\n",
      "        attributes only.\n",
      "    \n",
      "    localtime(...)\n",
      "        localtime([seconds]) -> (tm_year,tm_mon,tm_mday,tm_hour,tm_min,\n",
      "                                  tm_sec,tm_wday,tm_yday,tm_isdst)\n",
      "        \n",
      "        Convert seconds since the Epoch to a time tuple expressing local time.\n",
      "        When 'seconds' is not passed in, convert the current time instead.\n",
      "    \n",
      "    mktime(...)\n",
      "        mktime(tuple) -> floating point number\n",
      "        \n",
      "        Convert a time tuple in local time to seconds since the Epoch.\n",
      "        Note that mktime(gmtime(0)) will not generally return zero for most\n",
      "        time zones; instead the returned value will either be equal to that\n",
      "        of the timezone or altzone attributes on the time module.\n",
      "    \n",
      "    monotonic(...)\n",
      "        monotonic() -> float\n",
      "        \n",
      "        Monotonic clock, cannot go backward.\n",
      "    \n",
      "    monotonic_ns(...)\n",
      "        monotonic_ns() -> int\n",
      "        \n",
      "        Monotonic clock, cannot go backward, as nanoseconds.\n",
      "    \n",
      "    perf_counter(...)\n",
      "        perf_counter() -> float\n",
      "        \n",
      "        Performance counter for benchmarking.\n",
      "    \n",
      "    perf_counter_ns(...)\n",
      "        perf_counter_ns() -> int\n",
      "        \n",
      "        Performance counter for benchmarking as nanoseconds.\n",
      "    \n",
      "    process_time(...)\n",
      "        process_time() -> float\n",
      "        \n",
      "        Process time for profiling: sum of the kernel and user-space CPU time.\n",
      "    \n",
      "    process_time_ns(...)\n",
      "        process_time() -> int\n",
      "        \n",
      "        Process time for profiling as nanoseconds:\n",
      "        sum of the kernel and user-space CPU time.\n",
      "    \n",
      "    sleep(...)\n",
      "        sleep(seconds)\n",
      "        \n",
      "        Delay execution for a given number of seconds.  The argument may be\n",
      "        a floating point number for subsecond precision.\n",
      "    \n",
      "    strftime(...)\n",
      "        strftime(format[, tuple]) -> string\n",
      "        \n",
      "        Convert a time tuple to a string according to a format specification.\n",
      "        See the library reference manual for formatting codes. When the time tuple\n",
      "        is not present, current time as returned by localtime() is used.\n",
      "        \n",
      "        Commonly used format codes:\n",
      "        \n",
      "        %Y  Year with century as a decimal number.\n",
      "        %m  Month as a decimal number [01,12].\n",
      "        %d  Day of the month as a decimal number [01,31].\n",
      "        %H  Hour (24-hour clock) as a decimal number [00,23].\n",
      "        %M  Minute as a decimal number [00,59].\n",
      "        %S  Second as a decimal number [00,61].\n",
      "        %z  Time zone offset from UTC.\n",
      "        %a  Locale's abbreviated weekday name.\n",
      "        %A  Locale's full weekday name.\n",
      "        %b  Locale's abbreviated month name.\n",
      "        %B  Locale's full month name.\n",
      "        %c  Locale's appropriate date and time representation.\n",
      "        %I  Hour (12-hour clock) as a decimal number [01,12].\n",
      "        %p  Locale's equivalent of either AM or PM.\n",
      "        \n",
      "        Other codes may be available on your platform.  See documentation for\n",
      "        the C library strftime function.\n",
      "    \n",
      "    strptime(...)\n",
      "        strptime(string, format) -> struct_time\n",
      "        \n",
      "        Parse a string to a time tuple according to a format specification.\n",
      "        See the library reference manual for formatting codes (same as\n",
      "        strftime()).\n",
      "        \n",
      "        Commonly used format codes:\n",
      "        \n",
      "        %Y  Year with century as a decimal number.\n",
      "        %m  Month as a decimal number [01,12].\n",
      "        %d  Day of the month as a decimal number [01,31].\n",
      "        %H  Hour (24-hour clock) as a decimal number [00,23].\n",
      "        %M  Minute as a decimal number [00,59].\n",
      "        %S  Second as a decimal number [00,61].\n",
      "        %z  Time zone offset from UTC.\n",
      "        %a  Locale's abbreviated weekday name.\n",
      "        %A  Locale's full weekday name.\n",
      "        %b  Locale's abbreviated month name.\n",
      "        %B  Locale's full month name.\n",
      "        %c  Locale's appropriate date and time representation.\n",
      "        %I  Hour (12-hour clock) as a decimal number [01,12].\n",
      "        %p  Locale's equivalent of either AM or PM.\n",
      "        \n",
      "        Other codes may be available on your platform.  See documentation for\n",
      "        the C library strftime function.\n",
      "    \n",
      "    thread_time(...)\n",
      "        thread_time() -> float\n",
      "        \n",
      "        Thread time for profiling: sum of the kernel and user-space CPU time.\n",
      "    \n",
      "    thread_time_ns(...)\n",
      "        thread_time() -> int\n",
      "        \n",
      "        Thread time for profiling as nanoseconds:\n",
      "        sum of the kernel and user-space CPU time.\n",
      "    \n",
      "    time(...)\n",
      "        time() -> floating point number\n",
      "        \n",
      "        Return the current time in seconds since the Epoch.\n",
      "        Fractions of a second may be present if the system clock provides them.\n",
      "    \n",
      "    time_ns(...)\n",
      "        time_ns() -> int\n",
      "        \n",
      "        Return the current time in nanoseconds since the Epoch.\n",
      "\n",
      "DATA\n",
      "    altzone = -32400\n",
      "    daylight = 0\n",
      "    timezone = -28800\n",
      "    tzname = ('中国标准时间', '中国夏令时')\n",
      "\n",
      "FILE\n",
      "    (built-in)\n",
      "\n",
      "\n"
     ]
    }
   ],
   "source": [
    "help(time)"
   ]
  },
  {
   "cell_type": "markdown",
   "id": "527c8c88",
   "metadata": {},
   "source": [
    "# 3.赋值\n",
    "# 4.变量"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 27,
   "id": "8aaf1460",
   "metadata": {},
   "outputs": [],
   "source": [
    "walt_time = 26\n",
    "WaltTime = 34\n",
    "gf_of_liu = \"Lucy\""
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 28,
   "id": "4a2eb5e6",
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "26"
      ]
     },
     "execution_count": 28,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "walt_time"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 29,
   "id": "69d0b7f8",
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "'Lucy'"
      ]
     },
     "execution_count": 29,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "gf_of_liu"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 30,
   "id": "9d8fcacf",
   "metadata": {},
   "outputs": [
    {
     "ename": "SyntaxError",
     "evalue": "invalid syntax (Temp/ipykernel_9644/3048632948.py, line 1)",
     "output_type": "error",
     "traceback": [
      "\u001b[1;36m  File \u001b[1;32m\"C:\\Users\\11513\\AppData\\Local\\Temp/ipykernel_9644/3048632948.py\"\u001b[1;36m, line \u001b[1;32m1\u001b[0m\n\u001b[1;33m    2age =18\u001b[0m\n\u001b[1;37m     ^\u001b[0m\n\u001b[1;31mSyntaxError\u001b[0m\u001b[1;31m:\u001b[0m invalid syntax\n"
     ]
    }
   ],
   "source": [
    "2age =18"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "id": "06f13e68",
   "metadata": {},
   "outputs": [],
   "source": []
  }
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